32056522
Description
Quiz by Mohammed Arif Mazumder, updated more than 1 year ago
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Created by Mohammed Arif Mazumder
about 3 years ago
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Question 1
Question
What is the output of the following code snippet: (You can see the picture too)
if 'bar' in {'foo': 1, 'bar': 2, 'baz': 3}:
print(1)
print(2)
if 'a' in 'qux':
print(3)
print(4)
Image:
1 (binary/octet-stream)
Answer
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1 2 3 4
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1 2 4
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It doesn’t generate any output.
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4
Question 2
Question
The following if/elif/else statement will raise a KeyError exception:
d = {'a': 0, 'b': 1, 'c': 0}
if d['a'] > 0:
print('ok')
elif d['b'] > 0:
print('ok')
elif d['c'] > 0:
print('ok')
elif d['d'] > 0:
print('ok')
else:
print('not ok')
Image:
2 (binary/octet-stream)
Answer
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True
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False
Question 3
Question
Shown below is a diagram of a simple dictionary:
Which of the following is not a valid way to define this dictionary in Python:
Image:
3 (binary/octet-stream)
Answer
-
d = {'foo': 100, 'bar': 200, 'baz': 300}
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d = { ('foo', 100), ('bar', 200), ('baz', 300) }
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d = {} d['foo'] = 100 d['bar'] = 200 d['baz'] = 300
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d = dict(foo=100, bar=200, baz=300)
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d = dict([ ('foo', 100), ('bar', 200), ('baz', 300) ])
Question 4
Question
List a is defined as follows:
a = [1, 2, 3, 4, 5]
Select all of the following statements that remove the middle element 3 from a so that it equals [1, 2, 4, 5]:
Answer
-
a[2] = []
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del a[2]
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a.add(3)
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a[0:3] = []
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a[2:2] = []
Question 5
Question
Which of the following would separate a string input_string on the first 2 occurences of the letter “e”?
Answer
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input_string.split('e', 2)
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'e'.split(input_string, maxsplit=2)
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'e'.split(input_string, 2)
Question 6
Question
What is the output of the following code snippet:
d = {'foo': 1, 'bar': 2, 'baz': 3}
while d:
print(d.popitem())
print('Done.')
Image:
4 (binary/octet-stream)
Answer
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Done.
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foo bar baz
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The snippet doesn’t generate any output.
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('baz', 3) ('bar', 2) ('foo', 1) Done.
Question 7
Question
The function sqrt() from the math module computes the square root of a number.
Will the highlighted line of code raise an exception?
x = -100
from math import sqrt
x > 0 and sqrt(x)
Image:
5 (binary/octet-stream)
Answer
-
True
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False
Question 8
Question
Which of the following mathematical operators can be used to concatenate strings:
Answer
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+
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*
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/
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-
Question 9
Question
Suppose you have the following tuple definition:
t = ('foo', 'bar', 'baz')
Which of the following statements replaces the second element ('bar') with the string 'qux':
Answer
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It’s a trick question—tuples can’t be modified.
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t(1) = 'qux'
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t[1:1] = 'qux'
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t[1] = 'qux'
Question 10
Question
What is value of this expression:
'a' + 'x' if '123'.isdigit() else 'y' + 'b'
Image:
6 (binary/octet-stream)
Answer
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'ab'
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'axb'
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'ax'
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'axyb'
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